feat(reset): add binding and api method for git_reset_default (#14)

lib/src/bindings/reset.dart

@@ -1,6 +1,8 @@
 import 'dart:ffi';
 
+import 'package:ffi/ffi.dart';
 import 'package:libgit2dart/src/bindings/libgit2_bindings.dart';
+import 'package:libgit2dart/src/error.dart';
 import 'package:libgit2dart/src/util.dart';
 
 /// Sets the current head to the specified commit oid and optionally resets the
@@ -22,3 +24,43 @@ void reset({
 }) {
   libgit2.git_reset(repoPointer, targetPointer, resetType, checkoutOptsPointer);
 }
+
+/// Updates some entries in the index from the target commit tree.
+///
+/// The scope of the updated entries is determined by the paths being passed in
+/// the pathspec parameters.
+///
+/// Throws a [LibGit2Error] if error occured.
+void resetDefault({
+  required Pointer<git_repository> repoPointer,
+  required Pointer<git_object> targetPointer,
+  required List<String> pathspec,
+}) {
+  final pathspecC = calloc<git_strarray>();
+  final pathPointers =
+      pathspec.map((e) => e.toNativeUtf8().cast<Int8>()).toList();
+  final strArray = calloc<Pointer<Int8>>(pathspec.length);
+
+  for (var i = 0; i < pathspec.length; i++) {
+    strArray[i] = pathPointers[i];
+  }
+
+  pathspecC.ref.strings = strArray;
+  pathspecC.ref.count = pathspec.length;
+
+  final error = libgit2.git_reset_default(
+    repoPointer,
+    targetPointer,
+    pathspecC,
+  );
+
+  calloc.free(pathspecC);
+  for (final p in pathPointers) {
+    calloc.free(p);
+  }
+  calloc.free(strArray);
+
+  if (error < 0) {
+    throw LibGit2Error(libgit2.git_error_last());
+  }
+}

lib/src/repository.dart

@@ -1227,6 +1227,26 @@ class Repository {
     object_bindings.free(object);
   }
 
+  /// Updates some entries in the index from the [oid] commit tree.
+  ///
+  /// The scope of the updated entries is determined by the paths being passed
+  /// in the [pathspec].
+  ///
+  /// Throws a [LibGit2Error] if error occured.
+  void resetDefault({required Oid oid, required List<String> pathspec}) {
+    final object = object_bindings.lookup(
+      repoPointer: _repoPointer,
+      oidPointer: oid.pointer,
+      type: GitObject.commit.value,
+    );
+
+    reset_bindings.resetDefault(
+      repoPointer: _repoPointer,
+      targetPointer: object,
+      pathspec: pathspec,
+    );
+  }
+
   /// Returns a [Diff] with changes between the trees, tree and index, tree and
   /// workdir or index and workdir.
   ///

test/reset_test.dart

@@ -61,5 +61,32 @@ void main() {
 
       index.free();
     });
+
+    group('resetDefault', () {
+      test('successfully updates entry in the index', () {
+        file.writeAsStringSync('new edit');
+
+        final index = repo.index;
+        index.add('feature_file');
+        expect(repo.status['feature_file'], {GitStatus.indexModified});
+
+        final head = repo.head;
+        repo.resetDefault(oid: head.target, pathspec: ['feature_file']);
+        expect(repo.status['feature_file'], {GitStatus.wtModified});
+
+        head.free();
+        index.free();
+      });
+
+      test('throws when pathspec list is empty', () {
+        final head = repo.head;
+        expect(
+          () => repo.resetDefault(oid: head.target, pathspec: []),
+          throwsA(isA<LibGit2Error>()),
+        );
+
+        head.free();
+      });
+    });
   });
 }